Exercise bicycle



FIG. 1 is a front perspective view of an exercise bicycle showing my ournew design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a top perspective view thereof;

FIG. 6 is a bottom perspective view thereof;

FIG. 7 is a front elevational view thereof; and,

FIG. 8 is a rear elevational view thereof.

The ornamental design for an exercise bicycle, as shown.